Mineralogy Database

Schlegelite Mineral Data

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General Schlegelite Information

Help on Chemical  Formula: Chemical Formula: Bi7O4(MoO4)2(AsO4)3
Help on Composition: Composition: Molecular Weight = 2,227.18 gm
   Calcium      0.04 %  Ca    0.05 % CaO
   Vanadium     0.11 %  V     0.20 % V2O5
   Bismuth     63.62 %  Bi   70.92 % Bi2O3
   Molybdenum   8.18 %  Mo   12.28 % MoO3
   Arsenic     10.13 %  As   15.53 % As2O5
   Phosphorus   0.22 %  P     0.51 % P2O5
   Lead         0.47 %  Pb    0.50 % PbO
   Oxygen      17.23 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Bi6.78Pb0.05Ca0.02O3.51(MoO4)1.9(PO4)0.16(VO4)0.05(AsO4)3.01
Help on Environment: Environment: Secondary mineral formed from oxidation of primary sulfide ores.
Help on IMA Status: IMA Status: Approved IMA 2003 (Dana # Added)
Help on Locality: Locality: Mine dumps of the Pucher Shaft, Schneeberg District, Erzgebirge, Saxony, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Fritz Schlegel, a dedicated mineral collector.
Help on Synonym: Synonym: IMA2003-051

Schlegelite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3284:1:1.4844
Help on Cell Dimensions: Cell Dimensions: a = 5.299, b = 16.133, c = 23.948, Z = 4; V = 2,047.28 Den(Calc)= 7.23
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnca
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.688(1), 2.996(0.69), 2.963(0.48),3.41(0.37), 2.001(0.28), 1.657(0.14), 1.887(0.13),

Physical Properties of Schlegelite

Help on Color: Color: Yellow.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Adamantine
Help on Streak: Streak: pale yellow

Optical Properties of Schlegelite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.043 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1722,KC= 0.1652
Ncalc = 2.19
Help on Optical Data: Optical Data: Biaxial (-), a=2.22, b=2.255, g=2.26, bire=0.0400, 2V(Calc)=40, 2V(Meas)=42. Dispersion Calculated index values.

Calculated Properties of Schlegelite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.11 gm/cc
note: Specific Gravity of Schlegelite =7.23 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PESchlegelite =1,241.54 barns/electron
U=PESchlegelite x rElectron Density=7,591.91 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Schlegelite is Not Radioactive

Schlegelite Classification

Help on  Dana Class: Dana Class: (48)Anhydrous Molybdates and Tungstates
  (48.04)with miscellaneous formulae
  (48.04.03)Vergasovaite Series Vergasovaite! Cu3O[(Mo,S)O4][SO4] P nma 2/m 2/m 2/m Schlegelite! Bi7O4(MoO4)2(AsO4)3 Pnca 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.BO.45 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BO -With only large cations, (OH, etc.):RO4 � 1:1
08.BO.45 Schlegelite! Bi7O4(MoO4)2(AsO4)3 Pnca 2/m 2/m 2/m

Other Schlegelite Information

Help on References: References: NAME( EurJMin, v18:803) PHYS. PROP.(EurJMin, v18:803) OPTIC PROP.(EurJMin, v18:803)
Help on See Also: See Also: Links to other databases for Schlegelite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 08.BO.45





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